AVR-Chat

Sorry I thought you were looking in the list for an AVR644 which won't be
there ... but the ATmega644 may not be there either as some of the newer
processors need a different JTAG namely they require the MKII. I gave up on
JTAG here, I have a MK I and an ICE that I used for ATmega32 work. Worked
great but for newer work I just put in output were I need data and have
written an old fashion serial debug capability into my software. I do just
fine with old fashion techniques. JTAG when I was using it had a pretty
flaky studio and it was a pain.

Study the documentation for the device you have and the processor. You may
be out of luck with the JTAG you have.

I find the 644 a very nice chip and we just switch production from the 32 to
the 644. The 644 has more flash but for us it has an ability to switch the
processor clock divider from software which help keep the power down.

Anyway good luck, didn't mean to infer anything other that a miss-read name
like I've done many times.

Jim


----- Original Message ----- 
From: "anding_eunding" <anding_eunding@yahoo.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Saturday, June 24, 2006 2:48 PM
Subject: [AVR-Chat] Re: JTAG programming for the AVR644


> Yes, I'mean ATmega644.  It exists; I have a few.  Can anyone offer
> any clues on my original question?
>
> Many thanks,
>
> Andrew
>
> --- In AVR-Chat@yahoogroups.com, "James Hatley" <james.hatley@...>
> wrote:
> >
> > Is there a ATmega644 ... that's it.
> >
> > Jim
> >
> > ----- Original Message ----- 
> > From: "anding_eunding" <anding_eunding@...>
> > To: <AVR-Chat@yahoogroups.com>
> > Sent: Friday, June 23, 2006 10:34 PM
> > Subject: [AVR-Chat] JTAG programming for the AVR644
> >
> >
> > > I struggling to program an AVR644 (40DIP) with AVR Studio 4.12
> SP2,
> > > and an RS232 JTAG ICE programmer/debugger.
> > >
> > > Problem - AVR644 is not listed as a supported device for the
> JTAG ICE.
> > > Even though it apparently reads all the fuse and lock bits OK,
> > > programming ends in an error (FLASH Byte address is 0x00 should
> be
> > > 0x0C).
> > >
> > > I thought the AVR microcontrollers were quite intercompatible.
> Do I
> > > have to buy a new programmer just for the AVR644, or am I doing
> > > something wrong?   I really hope I can program this with the
> regular
> > > JTAG ICE!
> > >
> > > Many thanks for your help in advance,
> > >
> > > Andrew
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
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> Yahoo! Groups Links
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